Spatial variability of enthalpy and illuminance in free-range broiler sheds

نویسندگان

چکیده

ABSTRACT Free-range broiler producers are concerned with the thermal environment and lighting of their facilities seek to improve these factors for increased welfare broilers. The objective this study was evaluate spatialization illuminance enthalpy in two free-range sheds, one masonry a clay tile roof other built wood straw roof. data on air temperature, relative humidity, were recorded between September October 2018 five non-consecutive weeks periods during day: morning (9 hours) afternoon (15 hours). collected at 42 points per shed, spaced 0.40 × 0.75 m. experimental design completely randomized 2 factorial scheme, considering sheds. Spatial dependence evaluated using geostatistics interpolation maps by kriging. presented strong or moderate spatial all observed variables periods. small edges lack management curtains resulted shed having higher values both Although it did not present ideal comfortable environment, more thermally efficient.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Ranging Behaviour of Commercial Free-Range Broiler Chickens 1: Factors Related to Flock Variability

Little is known about the ranging behaviour of chickens. Understanding ranging behaviour is required to improve management and shed and range design to ensure optimal ranging opportunities. Using Radio Frequency Identification technology, we tracked 300 individual broiler chickens in each of four mixed sex ROSS 308 flocks on one commercial farm across two seasons. Ranging behaviour was tracked ...

متن کامل

Campylobacter infection of broiler chickens in a free-range environment

Campylobacter jejuni is the most common cause of bacterial gastroenteritis worldwide, with contaminated chicken meat considered to represent a major source of human infection. Biosecurity measures can reduce C. jejuni shedding rates of housed chickens, but the increasing popularity of free-range and organic meat raises the question of whether the welfare benefits of extensive production are com...

متن کامل

determination of maximal singularity free zones in the workspace of parallel manipulator

due to the limiting workspace of parallel manipulator and regarding to finding the trajectory planning of singularity free at workspace is difficult, so finding a best solution that can develop a technique to determine the singularity-free zones in the workspace of parallel manipulators is highly important. in this thesis a simple and new technique are presented to determine the maximal singula...

15 صفحه اول

Spatial and Temporal Variability of Water Quality for Karun River, in Upstream and Downstream Gotvand Dam

In this study, the spatial and temporal variability of water quality including monthly series of TDS, EC, So4, Cl, Ca and Na in common statistical period 1993-2014 was evaluated for the Karun River. This assessment is based on qualitative data stations including Susan in the upstream of Gotvand reservoir, Gotvand, Mollasani and Ahvaz in the downstream. To determine the parameters trend process,...

متن کامل

Assessment of Spatial and Temporal Variability of Extreme Precipitation Indices (North and West of Iran)

The frequency of precipitation extreme event can cause flood or change the drought period. Accurate understanding of these changes is necessary to take action to reduce these effects. In this research, temporal and spatial changes of 14 precipitation indices for eight synoptic stations in the North and West of the country were investigated. For this purpose, after reconstructing the daily preci...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Revista Brasileira de Engenharia Agricola e Ambiental

سال: 2021

ISSN: ['1415-4366', '1807-1929']

DOI: https://doi.org/10.1590/1807-1929/agriambi.v25n5p340-344